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Solubility of Niobium in aqueous solution containing high pH conditions

高pH条件を含む水系でのニオブの溶解度

岩田 孟 ; 北村 暁  

Iwata, Hajime; Kitamura, Akira

過飽和法と未飽和法を用いて水系でのニオブの溶解度を測定した。得られた結果をJAEA-TDBを用いた計算値と比較すると、過飽和法では計算値と近い値であったが、未飽和法では3桁程低い値が観測され、過飽和法と未飽和法の間で溶解度制限固相が異なることが示唆された。

The solubility of Nb was measured using oversaturation and undersaturation method. Compared with the values evaluated using JAEA-TDB, in the OS method a similar solubility was observed, and the measured values in the US method were around three orders magnitude below the evaluated values. It suggests that the solubility limiting solid differ between OS and US method.

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